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<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>盒子模型的应用</title>
    <link href="stylebox2.css" rel="stylesheet" style="text/css">
</head>
<body>
    <div class="top">
        <div class="top_content"></div>
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    <div class="body">
        <div class="body_img"></div>
        <div class="body_content">
            <div class="body_notice"></div>
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        <div class="footing_subnav"></div>
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</body>
</html>